I always felt dubious about the claim that a low-carb diet STARVES your microbiome, though of course it changes the precise populations, just like any diet followed consistently changes the enzymes your body produces, in order to process it efficiently. Now i have some interesting food for thought -- my favorite kind, because it causes no unpleasant physical repercussions. ;-)
Okay, so far we only actually have data on mice, not the best human-surrogate for nutritional matters, but at least it's a starting point. Somebody i follow on twitter posted this a day or two ago, and unable to find it again, i went to the horse's mouth -- google -- and found what i needed because i managed to remember a key word:
Check it out: www.the-scientist.com/?articles.view/articleNo/41134/title/Supporting-the--Good--Gut-Microbes/ -- a sugar i've never heard of before is what saves our little buggy codependants -- if we're mice -- so that when WE starve, deliberately or otherwise, the armies of our tiny master/slaves who help us break down our indigestibles don't become the first casualties of hardship. OUR BODIES FEED THEM, EVEN WHEN WE OURSELVES ARE NOT FED.
And so much for the people who claim that our poor little gut-bugs go HUUUUUNGREEEE if we don't give them raw potatoes, no matter how much lettuce, tomatoes, peppers, sunchokes, avocadoes, bok choy, nuts, mushrooms, jicama, collards, rutabagas, seeds, squashes, cucumbers, onions, berries, garlic, cauliflower, celeriac, salsify, asparagus, artichokes, broccoli, spinach, cabbage, rhubarb, kale, seaweed, nopalitos, mirlitons, olives, capers, sauerkraut, carrots, turnips, beets, chilis, yams, cassava, plantains, eggplants, celery, bean sprouts, snow peas, sweet potatoes, water chestnuts, okra, endive, hearts-of-palm, bamboo shoots, green beans, etc, that we DO eat....
The studies have not been done on humans, apparently, but if mice can do it, i'll bet we can too.